I really liked BackupPC, but found the storage requirements to be pretty staggering for ~100 machines. IIRC (it's been a decade), large files that were appende

I really liked BackupPC, but found the storage requirements to be pretty staggering for ~100 machines. IIRC (it's been a decade), large files that were appended to (log files, Zope DBs, pretty much any database), would get fully copied and stored for every backup copy saved. I also recall backup performance to be pretty bad, we had a number of systems that couldn't backup daily because they took >24 hours. We were adding new BackupPC servers constantly. I ended up building a backup system that was a thin layer and used SSH+rsync+ZFS for all the heavy lifting. Eventually added a web-based GUI. Went from 10 backup servers to 1 because of ZFS snapshots. ZFS snapshots is rsync+hardlinks on steroids. The software is available at: https://github.com/tummy-dot-com/tummy-backup https://github.com/tummy-dot-com/tummy-backup